Github user vkorukanti commented on a diff in the pull request:
https://github.com/apache/drill/pull/527#discussion_r73764733
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/ops/QueryContext.java ---
@@ -97,7 +94,7 @@ public QueryContext(final UserSession session, final
DrillbitContext drillbitCon
plannerSettings.getPlanningMemoryLimit());
bufferManager = new BufferManagerImpl(this.allocator);
viewExpansionContext = new ViewExpansionContext(this);
- schemaTreesToClose = Lists.newArrayList();
+ schemaTreeProvider = new SchemaTreeProvider(drillbitContext);
--- End diff --
yes. It contains the schema trees that are created within the query. It is
going to differ for every query depending upon what schemas are added. Also it
is a very light weight object.
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